On a June morning in 1908, something detonated over the Siberian taiga with the force of 185 Hiroshima bombs, flattening 80 million trees across 800 square miles — and leaving no crater. More than a century later, scientists are still arguing about exactly what fell out of the sky.
The scene-setter: a blast so large it knocked a man off his porch 40 miles away and lit night skies across Europe — yet the nearest scientists wouldn't reach the site for nearly two decades.
The full dossier: eyewitness accounts of a column of blue light, the delayed 1927 Kulik expedition that found trees splayed outward like spokes, and every competing explanation ever floated.
NASA's own account of how a 50-to-100-meter object exploded roughly 5 miles up, and why it became a founding case study for planetary defense.
Astronomers break down the airburst physics: why an object can vaporize itself mid-air and still flatten a forest larger than a major city without ever hitting the ground.
Down the rabbit hole of fringe theories the mystery invited: a natural hydrogen bomb, an antimatter fragment, a mini black hole, even a crashing UFO — and why none of them quite die.
A modern retrospective connecting Tunguska to the 2013 Chelyabinsk fireball, and what the two events reveal about how often the sky really does fall.
A 2020 study argues the object may have skimmed through the atmosphere and flown back out into space, never fully arriving — which would explain the missing crater and missing debris.